xbmc/utils/test/TestComponentContainer.cpp

   1 /*
   2  *  Copyright (C) 2015-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #include "utils/ComponentContainer.h"
  10
  11 #include <utility>
  12
  13 #include <gtest/gtest.h>
  14
  15 class BaseTestType
  16 {
  17 public:
  18   virtual ~BaseTestType() = default;
  19 };
  20
  21 struct DerivedType1 : public BaseTestType
  22 {
  23   int a = 1;
  24 };
  25
  26 struct DerivedType2 : public BaseTestType
  27 {
  28   int a = 2;
  29 };
  30
  31 struct DerivedType3 : public BaseTestType
  32 {
  33   int a = 3;
  34 };
  35
  36 class TestContainer : public CComponentContainer<BaseTestType>
  37 {
  38   FRIEND_TEST(TestComponentContainer, Generic);
  39 };
  40
  41 TEST(TestComponentContainer, Generic)
  42 {
  43   TestContainer container;
  44
  45   // check that we can register types
  46   container.RegisterComponent(std::make_shared<DerivedType1>());
  47   EXPECT_EQ(container.size(), 1u);
  48   container.RegisterComponent(std::make_shared<DerivedType2>());
  49   EXPECT_EQ(container.size(), 2u);
  50
  51   // check that trying to register a component twice does nothing
  52   container.RegisterComponent(std::make_shared<DerivedType2>());
  53   EXPECT_EQ(container.size(), 2u);
  54
  55   // check that first component is valid
  56   const auto t1 = container.GetComponent<DerivedType1>();
  57   EXPECT_TRUE(t1 != nullptr);
  58   EXPECT_EQ(t1->a, 1);
  59
  60   // check that second component is valid
  61   const auto t2 = container.GetComponent<DerivedType2>();
  62   EXPECT_TRUE(t2 != nullptr);
  63   EXPECT_EQ(t2->a, 2);
  64
  65   // check that third component is not there
  66   EXPECT_THROW(container.GetComponent<DerivedType3>(), std::logic_error);
  67
  68   // check that component instance is constant
  69   const auto t4 = container.GetComponent<DerivedType1>();
  70   EXPECT_EQ(t1.get(), t4.get());
  71
  72   // check we can call the const overload for GetComponent
  73   // and that the returned type is const
  74   const auto t5 = const_cast<const TestContainer&>(container).GetComponent<DerivedType1>();
  75   EXPECT_TRUE(std::is_const_v<typename decltype(t5)::element_type>);
  76 }